Hello Stephen, this isn't a nagios error. You seem to have some Problems with your network. Try pinging the monitored host from your nagios host and there you should also see duplicate icmp-replys... If you get this take a look at your network. kind regards, Dennis On Wed, 21 Nov 2007 08:07:34 -0000, "stephen wing" wrote: <blockquote style="padding-left: 5px; border-left-color: #1010ff; border-left-width: 2px; border-left-style: solid; margin-left: 5px; width: 100%"> <div class="Section1"> Hi All I have an intermittent ping problem. I am running nagios 1.2 on AIX and an monitoring both AIX and Windows client. I do a ping test using the check_ping command, but sometimes I get a problem with the ping which says “PING WARNING - DUPLICATES FOUND!”, this then sends me the notification, then almost immediately I get the recovery notification. Can anybody explain why this happens and is there anything I can do to stop getting these false errors. Regards Stephen --------------------------------------- Stephen Wing Steria Limited Senior Technical Consultant Telephone 02890393605 Mobile 07966823605 </div> ***************************************************************** This email originates from Steria Limited, registered office: Three Cherry Trees Lane, Hemel Hempstead, Hertfordshire HP2 7AH; Registered in England and Wales, number 2706218; www.steria.co.uk. This email and any attachments may contain confidential information and may be subject to copyright or other intellectual property rights. It is only for the use of the addressee(s). You are prohibited from copying, forwarding, disclosing, saving or otherwise using it in any way if you are not the addressee(s) or responsible for delivery. If you receive this email by mistake, please advise the sender and cancel it immediately. Steria may monitor the content of emails within its network to ensure compliance with its policies and procedures. Any email is susceptible to alteration and its integrity cannot be assured. Steria shall not be liable if the message is altered, modified, falsified, or edited. ================================================ </blockquote>